What are the main types of activated carbon?

29/07/2020

    Whether in industry or in life, the usage of activated carbon filters is gradually increasing. Most of the knowledge about activated carbon may be considered as a kind of black charcoal, and nothing is known about it. Below, this article will introduce the classification of activated carbon.

    Activated carbon is a kind of microcrystalline carbon material made of carbonaceous material with black appearance, developed internal pore structure, large surface area, and strong adsorption capacity. It is a commonly used adsorbent, catalyst, or catalyst carrier, widely used in almost all sectors of the national economy and people's daily life. Activated carbon classification-due to the different sources of raw materials, manufacturing methods, appearance and shape, and applications, there are no fewer than 1,000 types of activated carbon.

    According to the source of raw materials:

    It can be divided into wooden activated carbon (such as coconut shell activated carbon, apricot shell activated carbon, wood powdered carbon, etc.), mineral raw material activated carbon (active carbon made from various coal and petroleum and their processed products as raw materials), activated carbon made from other raw materials (such as Activated carbon made of waste rubber, waste plastic, etc.).

    According to appearance shape:

    Powdered activated carbon

    Generally, more than 90% of the activated carbon that passes through the 80-mesh standard sieve or the particle size is less than 0.175mm is generally called powdered activated carbon or powdered carbon. Powdered carbon has the advantages of faster adsorption speed and sufficient adsorption capacity when used, but it requires a proprietary separation method. With the advancement of separation technology and the emergence of certain application requirements, the particle size of powdered carbon tends to become more and more refined, and in some cases, it has reached the micron or even nanometer level.

    Granular activated carbon

    Generally, activated carbon with a particle size greater than 0.175 mm is called granular activated carbon.

    Granular activated carbon is divided into the following types:

    Unshaped granular activated carbon

    Unshaped granular activated carbon is generally made by carbonizing and activating granular raw materials, and then crushing and sieving to the required particle size. It can also be made by adding powdered activated carbon with a suitable binder and processing.

    Cylindrical activated carbon

    Cylindrical activated carbon, also known as columnar carbon, is generally made from powdered raw materials and binders through kneading, extrusion, and carbonization and activation. It can also be extruded with powdered activated carbon and binder. Columnar charcoal is divided into solid and hollow. Hollow columnar charcoal has one or more regular small holes in the columnar charcoal.

    Spherical activated carbon

    Spherical activated carbon, hence the name implies, is spherical activated carbon. Its preparation method is similar to that of columnar carbon, but there is a pelletizing process. It can also be made from liquid carbon-containing raw materials through spray granulation, oxidation, carbonization, and activation. It can also be processed by powdered activated carbon and binder into balls. Spherical activated carbon is also divided into solid and hollow spherical activated carbon. In addition to powdered activated carbon and granular activated carbon, the activated carbon of other shapes also has other shapes, such as activated carbon fiber, activated carbon fiber blanket, activated carbon cloth, honeycomb activated carbon, activated carbon board, and so on.

    Classified by application:

    As mentioned above, activated carbon is widely used in almost all sectors of the national economy and people’s daily lives. Because of this, it is difficult to classify activated carbon by application occasions. The problem is that the same activated carbon can be used in many occasions, but a certain occasion A variety of activated carbons can be used to achieve the same purpose. People often get their knowledge of activated carbon by application, so the word “××× activated carbon is often used as a fuzzy classification method of activated carbon before the term “activated carbon”. Such as sugar activated carbon, injection activated carbon, monosodium glutamate activated carbon, water purification activated carbon, and so on.